Enhanced electrocaloric effect in composition gradient bilayer thick films

Ying Hou; Lu Yang; Xiaoshi Qian; Tian Zhang; Q. M. Zhang

doi:10.1063/1.4944409

Enhanced electrocaloric effect in composition gradient bilayer thick films

Ying Hou, Lu Yang, Xiaoshi Qian, Tian Zhang, Q. M. Zhang

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26 Scopus citations

Abstract

We report the enhanced electrocaloric (EC) response over a broad temperature range in composition gradient Ba(ZrTi)O₃ based bilayer thick films. A large EC temperature change of -4.9 K under an electric field of 10 MV/m around room temperature, large electrocaloric coefficient ΔT/ΔE = 0.49 × 10^-6 K m V^-1 were observed in the BaZr_0.17Ti_0.83O₃/BaZr_0.20Ti_0.80O₃ bilayer thick films, which are improved compared with BaZr_0.20Ti_0.80O₃ and BaZr_0.17Ti_0.83O₃ homogeneous bilayer films. The result reveals the potential of the composition gradient bilayer structure in improving the electrocaloric effect, which may provide an effective route to achieve large EC temperature change under a low electric field.

Original language	English (US)
Article number	133501
Journal	Applied Physics Letters
Volume	108
Issue number	13
DOIs	https://doi.org/10.1063/1.4944409
State	Published - Mar 28 2016

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4944409

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title = "Enhanced electrocaloric effect in composition gradient bilayer thick films",

abstract = "We report the enhanced electrocaloric (EC) response over a broad temperature range in composition gradient Ba(ZrTi)O3 based bilayer thick films. A large EC temperature change of -4.9 K under an electric field of 10 MV/m around room temperature, large electrocaloric coefficient ΔT/ΔE = 0.49 × 10-6 K m V-1 were observed in the BaZr0.17Ti0.83O3/BaZr0.20Ti0.80O3 bilayer thick films, which are improved compared with BaZr0.20Ti0.80O3 and BaZr0.17Ti0.83O3 homogeneous bilayer films. The result reveals the potential of the composition gradient bilayer structure in improving the electrocaloric effect, which may provide an effective route to achieve large EC temperature change under a low electric field.",

author = "Ying Hou and Lu Yang and Xiaoshi Qian and Tian Zhang and Zhang, {Q. M.}",

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doi = "10.1063/1.4944409",

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T1 - Enhanced electrocaloric effect in composition gradient bilayer thick films

AU - Hou, Ying

AU - Yang, Lu

AU - Qian, Xiaoshi

AU - Zhang, Tian

AU - Zhang, Q. M.

PY - 2016/3/28

Y1 - 2016/3/28

N2 - We report the enhanced electrocaloric (EC) response over a broad temperature range in composition gradient Ba(ZrTi)O3 based bilayer thick films. A large EC temperature change of -4.9 K under an electric field of 10 MV/m around room temperature, large electrocaloric coefficient ΔT/ΔE = 0.49 × 10-6 K m V-1 were observed in the BaZr0.17Ti0.83O3/BaZr0.20Ti0.80O3 bilayer thick films, which are improved compared with BaZr0.20Ti0.80O3 and BaZr0.17Ti0.83O3 homogeneous bilayer films. The result reveals the potential of the composition gradient bilayer structure in improving the electrocaloric effect, which may provide an effective route to achieve large EC temperature change under a low electric field.

AB - We report the enhanced electrocaloric (EC) response over a broad temperature range in composition gradient Ba(ZrTi)O3 based bilayer thick films. A large EC temperature change of -4.9 K under an electric field of 10 MV/m around room temperature, large electrocaloric coefficient ΔT/ΔE = 0.49 × 10-6 K m V-1 were observed in the BaZr0.17Ti0.83O3/BaZr0.20Ti0.80O3 bilayer thick films, which are improved compared with BaZr0.20Ti0.80O3 and BaZr0.17Ti0.83O3 homogeneous bilayer films. The result reveals the potential of the composition gradient bilayer structure in improving the electrocaloric effect, which may provide an effective route to achieve large EC temperature change under a low electric field.

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Enhanced electrocaloric effect in composition gradient bilayer thick films

Abstract

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